15 Original Walking Bass Guitar lines in tablature and notation for the intermediate to advanced bassist. 176 bars of music over 15 Bass lines (average Bass line length 11.7 bars) Audio demonstrations and backing tracks for each Bass line at slow (70bpm), medium (135bpm) and fast (200bpm) speeds with video demonstrations for medium speed (Downloadable). Each Bass line includes an interval analysis of all of its notes and theory explanations of various approaches to chord changes.